/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf -i ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 21:08:37,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 21:08:37,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 21:08:38,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 21:08:38,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 21:08:38,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 21:08:38,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 21:08:38,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 21:08:38,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 21:08:38,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 21:08:38,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 21:08:38,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 21:08:38,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 21:08:38,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 21:08:38,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 21:08:38,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 21:08:38,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 21:08:38,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 21:08:38,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 21:08:38,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 21:08:38,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 21:08:38,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 21:08:38,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 21:08:38,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 21:08:38,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 21:08:38,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 21:08:38,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 21:08:38,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 21:08:38,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 21:08:38,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 21:08:38,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 21:08:38,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 21:08:38,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 21:08:38,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 21:08:38,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 21:08:38,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 21:08:38,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 21:08:38,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 21:08:38,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 21:08:38,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 21:08:38,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 21:08:38,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-13 21:08:38,190 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 21:08:38,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 21:08:38,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 21:08:38,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 21:08:38,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 21:08:38,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 21:08:38,193 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 21:08:38,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 21:08:38,194 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 21:08:38,194 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 21:08:38,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 21:08:38,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 21:08:38,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 21:08:38,195 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 21:08:38,195 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 21:08:38,195 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 21:08:38,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 21:08:38,195 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 21:08:38,196 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 21:08:38,196 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 21:08:38,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 21:08:38,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 21:08:38,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 21:08:38,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 21:08:38,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 21:08:38,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:08:38,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 21:08:38,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 21:08:38,198 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 21:08:38,198 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 21:08:38,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 21:08:38,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 21:08:38,198 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 21:08:38,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 21:08:38,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 21:08:38,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 21:08:38,600 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 21:08:38,600 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 21:08:38,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2021-10-13 21:08:38,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b21f3a22/c945f0591873480ea7a5fff801f46c08/FLAG416bf80a9 [2021-10-13 21:08:39,360 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 21:08:39,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2021-10-13 21:08:39,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b21f3a22/c945f0591873480ea7a5fff801f46c08/FLAG416bf80a9 [2021-10-13 21:08:39,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b21f3a22/c945f0591873480ea7a5fff801f46c08 [2021-10-13 21:08:39,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 21:08:39,401 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 21:08:39,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 21:08:39,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 21:08:39,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 21:08:39,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e2cd28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39, skipping insertion in model container [2021-10-13 21:08:39,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 21:08:39,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:08:39,652 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2754,2767] [2021-10-13 21:08:39,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:08:39,682 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 21:08:39,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 21:08:39,705 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2754,2767] [2021-10-13 21:08:39,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:08:39,717 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 21:08:39,747 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2754,2767] [2021-10-13 21:08:39,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 21:08:39,772 INFO L208 MainTranslator]: Completed translation [2021-10-13 21:08:39,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39 WrapperNode [2021-10-13 21:08:39,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 21:08:39,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 21:08:39,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 21:08:39,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 21:08:39,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 21:08:39,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 21:08:39,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 21:08:39,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 21:08:39,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 21:08:39,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 21:08:39,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 21:08:39,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 21:08:39,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (1/1) ... [2021-10-13 21:08:39,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 21:08:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 21:08:39,933 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 21:08:39,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 21:08:40,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 21:08:40,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 21:08:40,008 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 21:08:40,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 21:08:40,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 21:08:40,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 21:08:40,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 21:08:40,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 21:08:40,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 21:08:40,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 21:08:40,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 21:08:40,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 21:08:40,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 21:08:40,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 21:08:40,016 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 21:08:41,564 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 21:08:41,564 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-13 21:08:41,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:41 BoogieIcfgContainer [2021-10-13 21:08:41,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 21:08:41,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 21:08:41,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 21:08:41,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 21:08:41,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:39" (1/3) ... [2021-10-13 21:08:41,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16511e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:41, skipping insertion in model container [2021-10-13 21:08:41,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:39" (2/3) ... [2021-10-13 21:08:41,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16511e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:41, skipping insertion in model container [2021-10-13 21:08:41,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:41" (3/3) ... [2021-10-13 21:08:41,578 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2021-10-13 21:08:41,585 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 21:08:41,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-10-13 21:08:41,586 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 21:08:41,638 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,639 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,640 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,640 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,640 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,641 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,641 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,641 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,641 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,641 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,642 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,642 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,642 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,642 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,643 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,643 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,643 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,643 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,644 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,645 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,645 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,645 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,646 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,646 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,647 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,648 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,648 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,648 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,649 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,649 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,649 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,650 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,650 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,650 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,650 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,650 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,651 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,651 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,651 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,651 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,651 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,652 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,652 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,652 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,653 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,653 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,654 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,654 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,654 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,655 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,655 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,656 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,656 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,656 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,656 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,656 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,658 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,658 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,658 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,658 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,659 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,659 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,659 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,659 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,659 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,660 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,660 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,660 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,673 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,673 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,673 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,674 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,674 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,674 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,677 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,677 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,677 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,678 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,678 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,678 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,680 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,680 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,680 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,681 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 21:08:41,686 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-13 21:08:41,761 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 21:08:41,770 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 21:08:41,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2021-10-13 21:08:41,793 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 21:08:41,807 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 190 transitions, 396 flow [2021-10-13 21:08:41,811 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 190 transitions, 396 flow [2021-10-13 21:08:41,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 182 places, 190 transitions, 396 flow [2021-10-13 21:08:41,898 INFO L129 PetriNetUnfolder]: 15/188 cut-off events. [2021-10-13 21:08:41,899 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-13 21:08:41,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 188 events. 15/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 213 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2021-10-13 21:08:41,909 INFO L116 LiptonReduction]: Number of co-enabled transitions 1258 [2021-10-13 21:09:17,066 INFO L131 LiptonReduction]: Checked pairs total: 3246 [2021-10-13 21:09:17,066 INFO L133 LiptonReduction]: Total number of compositions: 208 [2021-10-13 21:09:17,077 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 53 places, 51 transitions, 118 flow [2021-10-13 21:09:17,110 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 371 states, 257 states have (on average 3.747081712062257) internal successors, (963), 370 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 371 states, 257 states have (on average 3.747081712062257) internal successors, (963), 370 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:09:17,121 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:17,122 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:09:17,122 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:17,128 INFO L82 PathProgramCache]: Analyzing trace with hash 25447, now seen corresponding path program 1 times [2021-10-13 21:09:17,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:17,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880042471] [2021-10-13 21:09:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:17,144 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:17,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:17,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:17,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 21:09:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:09:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:17,366 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-13 21:09:17,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-13 21:09:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:17,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:17,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:17,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880042471] [2021-10-13 21:09:17,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880042471] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:17,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:17,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-10-13 21:09:17,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110814368] [2021-10-13 21:09:17,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:09:17,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:17,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:09:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:17,452 INFO L87 Difference]: Start difference. First operand has 371 states, 257 states have (on average 3.747081712062257) internal successors, (963), 370 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:17,764 INFO L93 Difference]: Finished difference Result 319 states and 833 transitions. [2021-10-13 21:09:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:17,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:09:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:17,784 INFO L225 Difference]: With dead ends: 319 [2021-10-13 21:09:17,785 INFO L226 Difference]: Without dead ends: 319 [2021-10-13 21:09:17,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-10-13 21:09:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-10-13 21:09:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 231 states have (on average 3.606060606060606) internal successors, (833), 318 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 833 transitions. [2021-10-13 21:09:17,863 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 833 transitions. Word has length 2 [2021-10-13 21:09:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:17,863 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 833 transitions. [2021-10-13 21:09:17,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 833 transitions. [2021-10-13 21:09:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 21:09:17,864 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:17,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 21:09:17,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:18,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:18,077 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:18,079 INFO L82 PathProgramCache]: Analyzing trace with hash 25448, now seen corresponding path program 1 times [2021-10-13 21:09:18,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:18,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869588216] [2021-10-13 21:09:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:18,081 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:18,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:18,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:18,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 21:09:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 21:09:18,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:18,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:18,378 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:09:18,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:09:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:18,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:18,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:18,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869588216] [2021-10-13 21:09:18,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869588216] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:18,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:18,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:09:18,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357795041] [2021-10-13 21:09:18,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:18,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:18,567 INFO L87 Difference]: Start difference. First operand 319 states and 833 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:19,131 INFO L93 Difference]: Finished difference Result 324 states and 844 transitions. [2021-10-13 21:09:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:09:19,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 21:09:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:19,143 INFO L225 Difference]: With dead ends: 324 [2021-10-13 21:09:19,143 INFO L226 Difference]: Without dead ends: 324 [2021-10-13 21:09:19,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-13 21:09:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-10-13 21:09:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 235 states have (on average 3.5914893617021275) internal successors, (844), 322 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 844 transitions. [2021-10-13 21:09:19,176 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 844 transitions. Word has length 2 [2021-10-13 21:09:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:19,176 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 844 transitions. [2021-10-13 21:09:19,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 844 transitions. [2021-10-13 21:09:19,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 21:09:19,177 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:19,177 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 21:09:19,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:19,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:19,390 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:19,391 INFO L82 PathProgramCache]: Analyzing trace with hash 794295, now seen corresponding path program 1 times [2021-10-13 21:09:19,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:19,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888390517] [2021-10-13 21:09:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:19,393 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:19,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:19,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 21:09:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:19,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:09:19,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:19,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 21:09:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:19,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:19,680 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:19,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888390517] [2021-10-13 21:09:19,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888390517] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:19,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:19,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 21:09:19,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620157138] [2021-10-13 21:09:19,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:19,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:19,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:19,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:19,683 INFO L87 Difference]: Start difference. First operand 323 states and 844 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:19,992 INFO L93 Difference]: Finished difference Result 322 states and 841 transitions. [2021-10-13 21:09:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:19,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 21:09:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:19,996 INFO L225 Difference]: With dead ends: 322 [2021-10-13 21:09:19,996 INFO L226 Difference]: Without dead ends: 322 [2021-10-13 21:09:19,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-10-13 21:09:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-10-13 21:09:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 235 states have (on average 3.578723404255319) internal successors, (841), 321 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 841 transitions. [2021-10-13 21:09:20,024 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 841 transitions. Word has length 3 [2021-10-13 21:09:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:20,025 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 841 transitions. [2021-10-13 21:09:20,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 841 transitions. [2021-10-13 21:09:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:09:20,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:20,026 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 21:09:20,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:20,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:20,240 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash 24600264, now seen corresponding path program 1 times [2021-10-13 21:09:20,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:20,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049421607] [2021-10-13 21:09:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:20,243 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:20,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:20,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:20,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 21:09:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:20,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 21:09:20,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:20,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:20,543 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:09:20,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:09:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:20,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:21,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:21,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049421607] [2021-10-13 21:09:21,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049421607] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:21,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:21,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:09:21,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126756335] [2021-10-13 21:09:21,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:09:21,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:21,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:09:21,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:09:21,322 INFO L87 Difference]: Start difference. First operand 322 states and 841 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:28,043 INFO L93 Difference]: Finished difference Result 1267 states and 3326 transitions. [2021-10-13 21:09:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:09:28,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:09:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:28,058 INFO L225 Difference]: With dead ends: 1267 [2021-10-13 21:09:28,059 INFO L226 Difference]: Without dead ends: 1267 [2021-10-13 21:09:28,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 915.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:09:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-10-13 21:09:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 328. [2021-10-13 21:09:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 241 states have (on average 3.5560165975103732) internal successors, (857), 327 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 857 transitions. [2021-10-13 21:09:28,084 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 857 transitions. Word has length 4 [2021-10-13 21:09:28,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:28,084 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 857 transitions. [2021-10-13 21:09:28,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 857 transitions. [2021-10-13 21:09:28,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:09:28,085 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:28,085 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:09:28,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:28,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:28,299 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:28,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:28,300 INFO L82 PathProgramCache]: Analyzing trace with hash 24622886, now seen corresponding path program 1 times [2021-10-13 21:09:28,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:28,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114584870] [2021-10-13 21:09:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:28,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:28,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:28,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:28,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 21:09:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:09:28,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:28,686 INFO L354 Elim1Store]: treesize reduction 145, result has 24.9 percent of original size [2021-10-13 21:09:28,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 70 [2021-10-13 21:09:28,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 69 [2021-10-13 21:09:28,931 INFO L354 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2021-10-13 21:09:28,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 40 [2021-10-13 21:09:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:31,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:33,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:33,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114584870] [2021-10-13 21:09:33,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114584870] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 21:09:33,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 21:09:33,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2021-10-13 21:09:33,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836443160] [2021-10-13 21:09:33,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 21:09:33,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:33,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 21:09:33,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2021-10-13 21:09:33,461 INFO L87 Difference]: Start difference. First operand 328 states and 857 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:34,056 INFO L93 Difference]: Finished difference Result 267 states and 668 transitions. [2021-10-13 21:09:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:09:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:09:34,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:34,070 INFO L225 Difference]: With dead ends: 267 [2021-10-13 21:09:34,070 INFO L226 Difference]: Without dead ends: 267 [2021-10-13 21:09:34,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3673.0ms TimeCoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2021-10-13 21:09:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-10-13 21:09:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2021-10-13 21:09:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 202 states have (on average 3.3069306930693068) internal successors, (668), 266 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 668 transitions. [2021-10-13 21:09:34,093 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 668 transitions. Word has length 4 [2021-10-13 21:09:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:34,093 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 668 transitions. [2021-10-13 21:09:34,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 668 transitions. [2021-10-13 21:09:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 21:09:34,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:34,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 21:09:34,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:34,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:34,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash 24622888, now seen corresponding path program 1 times [2021-10-13 21:09:34,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:34,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571481985] [2021-10-13 21:09:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:34,370 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:34,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:34,372 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:34,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 21:09:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:34,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 21:09:34,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:34,576 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-13 21:09:34,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 33 [2021-10-13 21:09:34,695 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 21:09:34,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2021-10-13 21:09:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:34,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:35,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:35,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571481985] [2021-10-13 21:09:35,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571481985] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:35,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:35,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:09:35,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008175535] [2021-10-13 21:09:35,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:09:35,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:09:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:09:35,015 INFO L87 Difference]: Start difference. First operand 267 states and 668 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:35,280 INFO L93 Difference]: Finished difference Result 206 states and 479 transitions. [2021-10-13 21:09:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:35,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 21:09:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:35,283 INFO L225 Difference]: With dead ends: 206 [2021-10-13 21:09:35,283 INFO L226 Difference]: Without dead ends: 206 [2021-10-13 21:09:35,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:09:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-13 21:09:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-10-13 21:09:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 163 states have (on average 2.938650306748466) internal successors, (479), 205 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 479 transitions. [2021-10-13 21:09:35,292 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 479 transitions. Word has length 4 [2021-10-13 21:09:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:35,292 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 479 transitions. [2021-10-13 21:09:35,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 479 transitions. [2021-10-13 21:09:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:09:35,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:35,293 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:09:35,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:35,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:35,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:35,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2107191431, now seen corresponding path program 1 times [2021-10-13 21:09:35,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:35,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409401964] [2021-10-13 21:09:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:35,510 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:35,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:35,511 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:35,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 21:09:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 21:09:35,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:35,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:35,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-13 21:09:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:35,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:35,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409401964] [2021-10-13 21:09:35,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409401964] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:35,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:35,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 21:09:35,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408680085] [2021-10-13 21:09:35,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:09:35,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:35,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:09:35,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:09:35,994 INFO L87 Difference]: Start difference. First operand 206 states and 479 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:36,798 INFO L93 Difference]: Finished difference Result 354 states and 832 transitions. [2021-10-13 21:09:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:09:36,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:09:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:36,804 INFO L225 Difference]: With dead ends: 354 [2021-10-13 21:09:36,804 INFO L226 Difference]: Without dead ends: 354 [2021-10-13 21:09:36,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-13 21:09:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-10-13 21:09:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 206. [2021-10-13 21:09:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 168 states have (on average 3.267857142857143) internal successors, (549), 205 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 549 transitions. [2021-10-13 21:09:36,819 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 549 transitions. Word has length 6 [2021-10-13 21:09:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:36,820 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 549 transitions. [2021-10-13 21:09:36,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 549 transitions. [2021-10-13 21:09:36,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:09:36,821 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:36,821 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:09:36,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:37,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:37,039 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:37,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2107191430, now seen corresponding path program 1 times [2021-10-13 21:09:37,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:37,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518802407] [2021-10-13 21:09:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:37,041 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:37,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:37,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:37,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 21:09:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 21:09:37,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:37,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:37,160 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:37,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518802407] [2021-10-13 21:09:37,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518802407] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:37,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:37,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 21:09:37,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701742517] [2021-10-13 21:09:37,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 21:09:37,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:37,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 21:09:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:37,163 INFO L87 Difference]: Start difference. First operand 206 states and 549 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:37,340 INFO L93 Difference]: Finished difference Result 178 states and 469 transitions. [2021-10-13 21:09:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:37,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:09:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:37,343 INFO L225 Difference]: With dead ends: 178 [2021-10-13 21:09:37,343 INFO L226 Difference]: Without dead ends: 178 [2021-10-13 21:09:37,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 21:09:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-13 21:09:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-10-13 21:09:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 150 states have (on average 3.1266666666666665) internal successors, (469), 177 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 469 transitions. [2021-10-13 21:09:37,352 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 469 transitions. Word has length 6 [2021-10-13 21:09:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:37,352 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 469 transitions. [2021-10-13 21:09:37,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 469 transitions. [2021-10-13 21:09:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:09:37,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:37,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:09:37,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:37,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:37,565 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:37,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2107191281, now seen corresponding path program 1 times [2021-10-13 21:09:37,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:37,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079510366] [2021-10-13 21:09:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:37,567 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:37,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:37,568 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:37,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 21:09:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 21:09:37,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:37,891 INFO L354 Elim1Store]: treesize reduction 149, result has 22.8 percent of original size [2021-10-13 21:09:37,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 64 [2021-10-13 21:09:37,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2021-10-13 21:09:38,674 INFO L354 Elim1Store]: treesize reduction 60, result has 31.8 percent of original size [2021-10-13 21:09:38,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 54 [2021-10-13 21:09:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:41,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:09:42,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:42,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079510366] [2021-10-13 21:09:42,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079510366] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:42,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:42,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-10-13 21:09:42,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113684105] [2021-10-13 21:09:42,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 21:09:42,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:42,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 21:09:42,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 21:09:42,171 INFO L87 Difference]: Start difference. First operand 178 states and 469 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:43,534 INFO L93 Difference]: Finished difference Result 311 states and 842 transitions. [2021-10-13 21:09:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:09:43,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:09:43,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:43,541 INFO L225 Difference]: With dead ends: 311 [2021-10-13 21:09:43,541 INFO L226 Difference]: Without dead ends: 311 [2021-10-13 21:09:43,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1133.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-10-13 21:09:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-13 21:09:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 163. [2021-10-13 21:09:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 142 states have (on average 3.056338028169014) internal successors, (434), 162 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 434 transitions. [2021-10-13 21:09:43,550 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 434 transitions. Word has length 6 [2021-10-13 21:09:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:43,551 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 434 transitions. [2021-10-13 21:09:43,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 434 transitions. [2021-10-13 21:09:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:09:43,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:43,552 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:09:43,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:43,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:43,765 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2107191280, now seen corresponding path program 1 times [2021-10-13 21:09:43,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:43,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3713396] [2021-10-13 21:09:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:43,767 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:43,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:43,769 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:43,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 21:09:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:43,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:09:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:43,928 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-13 21:09:43,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-10-13 21:09:44,039 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-10-13 21:09:44,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 56 [2021-10-13 21:09:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:44,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:44,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:44,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3713396] [2021-10-13 21:09:44,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3713396] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:44,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:44,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:09:44,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658122517] [2021-10-13 21:09:44,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:09:44,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:09:44,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:44,299 INFO L87 Difference]: Start difference. First operand 163 states and 434 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:44,481 INFO L93 Difference]: Finished difference Result 148 states and 399 transitions. [2021-10-13 21:09:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:09:44,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:09:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:44,483 INFO L225 Difference]: With dead ends: 148 [2021-10-13 21:09:44,483 INFO L226 Difference]: Without dead ends: 148 [2021-10-13 21:09:44,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:09:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-13 21:09:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-10-13 21:09:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 134 states have (on average 2.9776119402985075) internal successors, (399), 147 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 399 transitions. [2021-10-13 21:09:44,492 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 399 transitions. Word has length 6 [2021-10-13 21:09:44,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:44,492 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 399 transitions. [2021-10-13 21:09:44,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 399 transitions. [2021-10-13 21:09:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 21:09:44,497 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:44,497 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 21:09:44,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:44,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:44,712 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2107191294, now seen corresponding path program 1 times [2021-10-13 21:09:44,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:44,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602975796] [2021-10-13 21:09:44,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:44,734 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:44,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:44,735 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:44,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 21:09:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:44,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 21:09:44,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:44,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:44,977 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:44,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602975796] [2021-10-13 21:09:44,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602975796] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:09:44,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:09:44,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:09:44,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286841891] [2021-10-13 21:09:44,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:09:44,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:44,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:09:44,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:09:44,980 INFO L87 Difference]: Start difference. First operand 148 states and 399 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:09:45,245 INFO L93 Difference]: Finished difference Result 211 states and 540 transitions. [2021-10-13 21:09:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 21:09:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 21:09:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:09:45,253 INFO L225 Difference]: With dead ends: 211 [2021-10-13 21:09:45,253 INFO L226 Difference]: Without dead ends: 199 [2021-10-13 21:09:45,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:09:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-13 21:09:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 190. [2021-10-13 21:09:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 175 states have (on average 2.8457142857142856) internal successors, (498), 189 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 498 transitions. [2021-10-13 21:09:45,271 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 498 transitions. Word has length 6 [2021-10-13 21:09:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:09:45,272 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 498 transitions. [2021-10-13 21:09:45,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:09:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 498 transitions. [2021-10-13 21:09:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:09:45,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:09:45,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:09:45,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 21:09:45,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:09:45,475 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:09:45,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:09:45,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1546837411, now seen corresponding path program 1 times [2021-10-13 21:09:45,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:09:45,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234768615] [2021-10-13 21:09:45,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:09:45,477 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:09:45,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:09:45,478 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:09:45,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 21:09:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:09:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:09:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:09:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:45,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:09:45,941 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:09:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 71 [2021-10-13 21:09:46,000 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-13 21:09:46,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 80 [2021-10-13 21:09:46,187 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:09:46,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-10-13 21:09:46,200 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 21:09:46,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-10-13 21:09:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:48,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:09:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:09:50,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:09:50,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234768615] [2021-10-13 21:09:50,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234768615] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:09:50,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:09:50,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 21:09:50,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265440213] [2021-10-13 21:09:50,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 21:09:50,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:09:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 21:09:50,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 21:09:50,285 INFO L87 Difference]: Start difference. First operand 190 states and 498 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:07,337 INFO L93 Difference]: Finished difference Result 449 states and 1163 transitions. [2021-10-13 21:10:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 21:10:07,339 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 21:10:07,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:07,343 INFO L225 Difference]: With dead ends: 449 [2021-10-13 21:10:07,343 INFO L226 Difference]: Without dead ends: 449 [2021-10-13 21:10:07,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 14612.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-13 21:10:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-10-13 21:10:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 278. [2021-10-13 21:10:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 263 states have (on average 2.931558935361217) internal successors, (771), 277 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 771 transitions. [2021-10-13 21:10:07,358 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 771 transitions. Word has length 7 [2021-10-13 21:10:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:07,358 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 771 transitions. [2021-10-13 21:10:07,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 771 transitions. [2021-10-13 21:10:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:10:07,359 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:07,359 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:10:07,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 21:10:07,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:10:07,560 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:10:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:07,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1546837410, now seen corresponding path program 1 times [2021-10-13 21:10:07,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:07,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699682747] [2021-10-13 21:10:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:10:07,566 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:07,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:07,568 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:10:07,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 21:10:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:10:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 21:10:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:07,825 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-13 21:10:07,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2021-10-13 21:10:07,891 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 21:10:07,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-13 21:10:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:10:07,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:10:10,077 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:10,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699682747] [2021-10-13 21:10:10,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699682747] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:10:10,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:10:10,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:10:10,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246812305] [2021-10-13 21:10:10,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:10:10,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:10:10,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=1, NotChecked=0, Total=30 [2021-10-13 21:10:10,079 INFO L87 Difference]: Start difference. First operand 278 states and 771 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:10,367 INFO L93 Difference]: Finished difference Result 228 states and 595 transitions. [2021-10-13 21:10:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:10:10,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 21:10:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:10,372 INFO L225 Difference]: With dead ends: 228 [2021-10-13 21:10:10,372 INFO L226 Difference]: Without dead ends: 228 [2021-10-13 21:10:10,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2104.9ms TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-10-13 21:10:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-13 21:10:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-10-13 21:10:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 219 states have (on average 2.7168949771689497) internal successors, (595), 227 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 595 transitions. [2021-10-13 21:10:10,384 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 595 transitions. Word has length 7 [2021-10-13 21:10:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:10,384 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 595 transitions. [2021-10-13 21:10:10,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 595 transitions. [2021-10-13 21:10:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 21:10:10,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:10,386 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2021-10-13 21:10:10,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 21:10:10,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:10:10,601 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:10:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:10,601 INFO L82 PathProgramCache]: Analyzing trace with hash -899483583, now seen corresponding path program 1 times [2021-10-13 21:10:10,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:10,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938543505] [2021-10-13 21:10:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:10:10,603 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:10,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:10,604 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:10:10,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 21:10:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:10:10,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 21:10:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:10,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 21:10:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:10,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:12,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:12,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938543505] [2021-10-13 21:10:12,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938543505] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:12,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:12,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 21:10:12,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397390064] [2021-10-13 21:10:12,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 21:10:12,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 21:10:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-13 21:10:12,159 INFO L87 Difference]: Start difference. First operand 228 states and 595 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:25,167 INFO L93 Difference]: Finished difference Result 1667 states and 4474 transitions. [2021-10-13 21:10:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 21:10:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 21:10:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:25,184 INFO L225 Difference]: With dead ends: 1667 [2021-10-13 21:10:25,184 INFO L226 Difference]: Without dead ends: 1667 [2021-10-13 21:10:25,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3014.0ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:10:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-10-13 21:10:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 246. [2021-10-13 21:10:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 237 states have (on average 2.6624472573839664) internal successors, (631), 245 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 631 transitions. [2021-10-13 21:10:25,209 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 631 transitions. Word has length 7 [2021-10-13 21:10:25,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:25,210 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 631 transitions. [2021-10-13 21:10:25,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 631 transitions. [2021-10-13 21:10:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:10:25,213 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:25,213 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1] [2021-10-13 21:10:25,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-13 21:10:25,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:10:25,428 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:10:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1377350264, now seen corresponding path program 2 times [2021-10-13 21:10:25,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:25,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439876149] [2021-10-13 21:10:25,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:10:25,430 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:25,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:25,432 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:10:25,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 21:10:25,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:10:25,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:25,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:10:25,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:25,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:25,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:25,796 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:10:25,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:10:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:26,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:27,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:27,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439876149] [2021-10-13 21:10:27,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439876149] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:27,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:27,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 21:10:27,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004259105] [2021-10-13 21:10:27,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 21:10:27,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:27,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 21:10:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 21:10:27,919 INFO L87 Difference]: Start difference. First operand 246 states and 631 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:49,373 INFO L93 Difference]: Finished difference Result 1675 states and 4490 transitions. [2021-10-13 21:10:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 21:10:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 21:10:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:49,389 INFO L225 Difference]: With dead ends: 1675 [2021-10-13 21:10:49,389 INFO L226 Difference]: Without dead ends: 1675 [2021-10-13 21:10:49,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 6952.4ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 21:10:49,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-10-13 21:10:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 254. [2021-10-13 21:10:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 245 states have (on average 2.6408163265306124) internal successors, (647), 253 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 647 transitions. [2021-10-13 21:10:49,413 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 647 transitions. Word has length 8 [2021-10-13 21:10:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:49,413 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 647 transitions. [2021-10-13 21:10:49,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 647 transitions. [2021-10-13 21:10:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 21:10:49,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:49,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:10:49,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 21:10:49,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:10:49,628 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:10:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:49,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2081268780, now seen corresponding path program 1 times [2021-10-13 21:10:49,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:49,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902262077] [2021-10-13 21:10:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:10:49,630 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:49,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:49,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:10:49,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 21:10:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:10:49,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 21:10:49,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:49,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 21:10:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:10:50,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 21:10:50,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:50,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902262077] [2021-10-13 21:10:50,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902262077] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:10:50,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:10:50,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-13 21:10:50,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273709688] [2021-10-13 21:10:50,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 21:10:50,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 21:10:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 21:10:50,742 INFO L87 Difference]: Start difference. First operand 254 states and 647 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:53,512 INFO L93 Difference]: Finished difference Result 650 states and 1622 transitions. [2021-10-13 21:10:53,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 21:10:53,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 21:10:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:53,518 INFO L225 Difference]: With dead ends: 650 [2021-10-13 21:10:53,518 INFO L226 Difference]: Without dead ends: 650 [2021-10-13 21:10:53,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 921.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-13 21:10:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-10-13 21:10:53,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 554. [2021-10-13 21:10:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 545 states have (on average 2.697247706422018) internal successors, (1470), 553 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1470 transitions. [2021-10-13 21:10:53,536 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1470 transitions. Word has length 8 [2021-10-13 21:10:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:53,537 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1470 transitions. [2021-10-13 21:10:53,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1470 transitions. [2021-10-13 21:10:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 21:10:53,538 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:53,539 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-13 21:10:53,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 21:10:53,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:10:53,751 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:10:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:53,752 INFO L82 PathProgramCache]: Analyzing trace with hash -761917758, now seen corresponding path program 2 times [2021-10-13 21:10:53,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:53,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371191832] [2021-10-13 21:10:53,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:10:53,753 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:53,755 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:10:53,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 21:10:53,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 21:10:53,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:53,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 21:10:53,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:53,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:53,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:10:54,154 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:10:54,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 71 [2021-10-13 21:10:54,207 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-10-13 21:10:54,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 80 [2021-10-13 21:10:54,379 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-13 21:10:54,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-10-13 21:10:54,394 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 21:10:54,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-10-13 21:10:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 21:10:54,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:10:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 21:10:57,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:10:57,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371191832] [2021-10-13 21:10:57,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371191832] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:10:57,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:10:57,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-13 21:10:57,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325331811] [2021-10-13 21:10:57,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 21:10:57,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:10:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 21:10:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:10:57,321 INFO L87 Difference]: Start difference. First operand 554 states and 1470 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:10:57,740 INFO L93 Difference]: Finished difference Result 490 states and 1263 transitions. [2021-10-13 21:10:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 21:10:57,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 21:10:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:10:57,745 INFO L225 Difference]: With dead ends: 490 [2021-10-13 21:10:57,745 INFO L226 Difference]: Without dead ends: 490 [2021-10-13 21:10:57,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 21:10:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-10-13 21:10:57,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-10-13 21:10:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 2.5351170568561874) internal successors, (758), 303 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 758 transitions. [2021-10-13 21:10:57,757 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 758 transitions. Word has length 10 [2021-10-13 21:10:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:10:57,757 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 758 transitions. [2021-10-13 21:10:57,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:10:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 758 transitions. [2021-10-13 21:10:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 21:10:57,760 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:10:57,760 INFO L512 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2021-10-13 21:10:57,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 21:10:57,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:10:57,973 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:10:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:10:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash -36511935, now seen corresponding path program 2 times [2021-10-13 21:10:57,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:10:57,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160743564] [2021-10-13 21:10:57,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:10:57,976 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:10:57,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:10:57,977 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:10:57,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 21:10:58,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:10:58,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:10:58,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 21:10:58,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:10:58,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 21:10:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:10:58,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:11:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:11:03,328 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:11:03,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160743564] [2021-10-13 21:11:03,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160743564] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:11:03,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:11:03,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-10-13 21:11:03,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312466732] [2021-10-13 21:11:03,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 21:11:03,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:11:03,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 21:11:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-10-13 21:11:03,330 INFO L87 Difference]: Start difference. First operand 304 states and 758 transitions. Second operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:55,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:11:55,265 INFO L93 Difference]: Finished difference Result 5344 states and 13764 transitions. [2021-10-13 21:11:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 21:11:55,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 21:11:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:11:55,328 INFO L225 Difference]: With dead ends: 5344 [2021-10-13 21:11:55,328 INFO L226 Difference]: Without dead ends: 5344 [2021-10-13 21:11:55,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 25634.3ms TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 21:11:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2021-10-13 21:11:55,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 328. [2021-10-13 21:11:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 323 states have (on average 2.4953560371517027) internal successors, (806), 327 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 806 transitions. [2021-10-13 21:11:55,401 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 806 transitions. Word has length 13 [2021-10-13 21:11:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:11:55,402 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 806 transitions. [2021-10-13 21:11:55,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:11:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 806 transitions. [2021-10-13 21:11:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 21:11:55,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:11:55,404 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-10-13 21:11:55,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 21:11:55,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:11:55,618 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:11:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:11:55,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1916649573, now seen corresponding path program 2 times [2021-10-13 21:11:55,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:11:55,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327045709] [2021-10-13 21:11:55,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 21:11:55,620 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:11:55,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:11:55,621 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:11:55,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 21:11:55,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 21:11:55,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:11:55,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 21:11:55,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:11:55,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-13 21:11:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:11:56,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:11:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:11:59,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:11:59,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327045709] [2021-10-13 21:11:59,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327045709] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:11:59,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:11:59,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-13 21:11:59,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721065968] [2021-10-13 21:11:59,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 21:11:59,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:11:59,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 21:11:59,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-10-13 21:11:59,023 INFO L87 Difference]: Start difference. First operand 328 states and 806 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:12:10,074 INFO L93 Difference]: Finished difference Result 752 states and 1771 transitions. [2021-10-13 21:12:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 21:12:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 21:12:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:12:10,080 INFO L225 Difference]: With dead ends: 752 [2021-10-13 21:12:10,080 INFO L226 Difference]: Without dead ends: 746 [2021-10-13 21:12:10,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 5030.6ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-10-13 21:12:10,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-10-13 21:12:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 476. [2021-10-13 21:12:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 2.4904458598726116) internal successors, (1173), 475 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1173 transitions. [2021-10-13 21:12:10,101 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1173 transitions. Word has length 14 [2021-10-13 21:12:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:12:10,101 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1173 transitions. [2021-10-13 21:12:10,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1173 transitions. [2021-10-13 21:12:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:12:10,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:12:10,103 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1] [2021-10-13 21:12:10,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 21:12:10,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:12:10,317 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:12:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:12:10,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1329007368, now seen corresponding path program 3 times [2021-10-13 21:12:10,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:12:10,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447000443] [2021-10-13 21:12:10,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:12:10,319 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:12:10,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:12:10,320 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:12:10,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 21:12:10,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 21:12:10,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:12:10,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 21:12:10,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:12:10,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:12:10,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:12:10,943 INFO L354 Elim1Store]: treesize reduction 141, result has 26.9 percent of original size [2021-10-13 21:12:10,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 59 [2021-10-13 21:12:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:12:11,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:12:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 21:12:19,688 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:12:19,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447000443] [2021-10-13 21:12:19,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447000443] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 21:12:19,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 21:12:19,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 21:12:19,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797635882] [2021-10-13 21:12:19,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 21:12:19,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:12:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 21:12:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-10-13 21:12:19,692 INFO L87 Difference]: Start difference. First operand 476 states and 1173 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:12:37,040 WARN L207 SmtUtils]: Spent 11.78 s on a formula simplification that was a NOOP. DAG size: 168 [2021-10-13 21:12:45,771 WARN L207 SmtUtils]: Spent 7.47 s on a formula simplification that was a NOOP. DAG size: 157 [2021-10-13 21:12:54,995 WARN L207 SmtUtils]: Spent 7.89 s on a formula simplification that was a NOOP. DAG size: 146 [2021-10-13 21:13:29,577 WARN L207 SmtUtils]: Spent 5.32 s on a formula simplification that was a NOOP. DAG size: 136 [2021-10-13 21:13:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:13:58,035 INFO L93 Difference]: Finished difference Result 4226 states and 10842 transitions. [2021-10-13 21:13:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 21:13:58,036 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 21:13:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:13:58,064 INFO L225 Difference]: With dead ends: 4226 [2021-10-13 21:13:58,065 INFO L226 Difference]: Without dead ends: 4226 [2021-10-13 21:13:58,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 66211.5ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 21:13:58,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-10-13 21:13:58,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 492. [2021-10-13 21:13:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 487 states have (on average 2.4743326488706368) internal successors, (1205), 491 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:13:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1205 transitions. [2021-10-13 21:13:58,113 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1205 transitions. Word has length 16 [2021-10-13 21:13:58,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:13:58,114 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1205 transitions. [2021-10-13 21:13:58,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:13:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1205 transitions. [2021-10-13 21:13:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 21:13:58,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:13:58,116 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 21:13:58,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 21:13:58,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:13:58,331 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:13:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:13:58,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1727703330, now seen corresponding path program 1 times [2021-10-13 21:13:58,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:13:58,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214628178] [2021-10-13 21:13:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 21:13:58,332 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:13:58,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:13:58,333 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:13:58,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 21:13:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 21:13:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 21:13:58,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:13:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:13:58,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:13:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 21:13:58,731 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 21:13:58,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214628178] [2021-10-13 21:13:58,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214628178] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 21:13:58,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 21:13:58,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-13 21:13:58,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958411006] [2021-10-13 21:13:58,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 21:13:58,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 21:13:58,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 21:13:58,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:13:58,738 INFO L87 Difference]: Start difference. First operand 492 states and 1205 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:13:58,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 21:13:58,768 INFO L93 Difference]: Finished difference Result 703 states and 1794 transitions. [2021-10-13 21:13:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 21:13:58,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 21:13:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 21:13:58,773 INFO L225 Difference]: With dead ends: 703 [2021-10-13 21:13:58,774 INFO L226 Difference]: Without dead ends: 677 [2021-10-13 21:13:58,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 21:13:58,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-10-13 21:13:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 593. [2021-10-13 21:13:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 588 states have (on average 2.5136054421768708) internal successors, (1478), 592 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:13:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1478 transitions. [2021-10-13 21:13:58,792 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1478 transitions. Word has length 16 [2021-10-13 21:13:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 21:13:58,792 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1478 transitions. [2021-10-13 21:13:58,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 21:13:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1478 transitions. [2021-10-13 21:13:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 21:13:58,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 21:13:58,795 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2021-10-13 21:13:58,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 21:13:59,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:13:59,009 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATION === [thread1Err0REQUIRES_VIOLATION, thread1Err1REQUIRES_VIOLATION, thread1Err2REQUIRES_VIOLATION, thread1Err3REQUIRES_VIOLATION (and 34 more)] === [2021-10-13 21:13:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 21:13:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash -896146435, now seen corresponding path program 3 times [2021-10-13 21:13:59,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 21:13:59,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133046419] [2021-10-13 21:13:59,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 21:13:59,010 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 21:13:59,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat [2021-10-13 21:13:59,012 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 21:13:59,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 21:13:59,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 21:13:59,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 21:13:59,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 21:13:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 21:13:59,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:59,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:59,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:59,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:13:59,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:59,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:59,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:13:59,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 21:13:59,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 21:13:59,713 INFO L354 Elim1Store]: treesize reduction 74, result has 32.1 percent of original size [2021-10-13 21:13:59,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 82 [2021-10-13 21:14:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-13 21:14:02,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 21:14:05,863 INFO L354 Elim1Store]: treesize reduction 359, result has 10.3 percent of original size [2021-10-13 21:14:05,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 158762790622 treesize of output 106820529926 Received shutdown request... [2021-10-13 21:22:57,279 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:22:57,297 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 21:22:57,316 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:22:57,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 21:22:57,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-10-13 21:22:57,532 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. [2021-10-13 21:22:57,534 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:22:57,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1REQUIRES_VIOLATION [2021-10-13 21:22:57,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-13 21:22:57,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-13 21:22:57,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4REQUIRES_VIOLATION [2021-10-13 21:22:57,536 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5REQUIRES_VIOLATION [2021-10-13 21:22:57,539 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err6REQUIRES_VIOLATION [2021-10-13 21:22:57,540 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err7REQUIRES_VIOLATION [2021-10-13 21:22:57,540 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:22:57,540 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:22:57,540 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 21:22:57,541 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 21:22:57,541 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 21:22:57,541 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 21:22:57,541 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 21:22:57,542 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 21:22:57,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 21:22:57,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 21:22:57,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 21:22:57,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 21:22:57,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 21:22:57,544 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 21:22:57,544 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 21:22:57,544 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 21:22:57,544 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:22:57,544 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 21:22:57,545 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 21:22:57,545 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 21:22:57,545 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0REQUIRES_VIOLATION [2021-10-13 21:22:57,545 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2REQUIRES_VIOLATION [2021-10-13 21:22:57,546 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3REQUIRES_VIOLATION [2021-10-13 21:22:57,546 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4REQUIRES_VIOLATION [2021-10-13 21:22:57,546 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5REQUIRES_VIOLATION [2021-10-13 21:22:57,546 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err6REQUIRES_VIOLATION [2021-10-13 21:22:57,546 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err7REQUIRES_VIOLATION [2021-10-13 21:22:57,547 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0REQUIRES_VIOLATION [2021-10-13 21:22:57,548 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1REQUIRES_VIOLATION [2021-10-13 21:22:57,562 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 21:22:57,562 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 21:22:57,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:22:57 BasicIcfg [2021-10-13 21:22:57,567 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 21:22:57,568 INFO L168 Benchmark]: Toolchain (without parser) took 858172.68 ms. Allocated memory was 178.3 MB in the beginning and 723.5 MB in the end (delta: 545.3 MB). Free memory was 151.9 MB in the beginning and 541.3 MB in the end (delta: -389.4 MB). Peak memory consumption was 460.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:57,569 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 178.3 MB. Free memory was 149.1 MB in the beginning and 149.0 MB in the end (delta: 102.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 21:22:57,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.40 ms. Allocated memory is still 178.3 MB. Free memory was 151.7 MB in the beginning and 138.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:57,572 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.93 ms. Allocated memory is still 178.3 MB. Free memory was 138.4 MB in the beginning and 136.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:57,572 INFO L168 Benchmark]: Boogie Preprocessor took 40.45 ms. Allocated memory is still 178.3 MB. Free memory was 136.4 MB in the beginning and 134.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:57,573 INFO L168 Benchmark]: RCFGBuilder took 1691.17 ms. Allocated memory is still 178.3 MB. Free memory was 134.5 MB in the beginning and 135.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:57,573 INFO L168 Benchmark]: TraceAbstraction took 855997.19 ms. Allocated memory was 178.3 MB in the beginning and 723.5 MB in the end (delta: 545.3 MB). Free memory was 135.1 MB in the beginning and 541.3 MB in the end (delta: -406.2 MB). Peak memory consumption was 442.7 MB. Max. memory is 8.0 GB. [2021-10-13 21:22:57,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 178.3 MB. Free memory was 149.1 MB in the beginning and 149.0 MB in the end (delta: 102.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 371.40 ms. Allocated memory is still 178.3 MB. Free memory was 151.7 MB in the beginning and 138.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 59.93 ms. Allocated memory is still 178.3 MB. Free memory was 138.4 MB in the beginning and 136.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.45 ms. Allocated memory is still 178.3 MB. Free memory was 136.4 MB in the beginning and 134.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1691.17 ms. Allocated memory is still 178.3 MB. Free memory was 134.5 MB in the beginning and 135.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 855997.19 ms. Allocated memory was 178.3 MB in the beginning and 723.5 MB in the end (delta: 545.3 MB). Free memory was 135.1 MB in the beginning and 541.3 MB in the end (delta: -406.2 MB). Peak memory consumption was 442.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 35255.6ms, 182 PlacesBefore, 53 PlacesAfterwards, 190 TransitionsBefore, 51 TransitionsAfterwards, 1258 CoEnabledTransitionPairs, 7 FixpointIterations, 134 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 5 ConcurrentYvCompositions, 10 ChoiceCompositions, 208 TotalNumberOfCompositions, 3246 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1955, positive: 1836, positive conditional: 0, positive unconditional: 1836, negative: 119, negative conditional: 0, negative unconditional: 119, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 827, positive: 800, positive conditional: 0, positive unconditional: 800, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 827, positive: 783, positive conditional: 0, positive unconditional: 783, negative: 44, negative conditional: 0, negative unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 44, positive: 17, positive conditional: 0, positive unconditional: 17, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2623, positive: 832, positive conditional: 0, positive unconditional: 832, negative: 1791, negative conditional: 0, negative unconditional: 1791, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1955, positive: 1036, positive conditional: 0, positive unconditional: 1036, negative: 92, negative conditional: 0, negative unconditional: 92, unknown: 827, unknown conditional: 0, unknown unconditional: 827] , Statistics on independence cache: Total cache size (in pairs): 130, Positive cache size: 117, Positive conditional cache size: 0, Positive unconditional cache size: 117, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-6-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-3-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 208 locations, 38 error locations. Started 1 CEGAR loops. OverallTime: 855794.5ms, OverallIterations: 22, TraceHistogramMax: 14, EmptinessCheckTime: 37.4ms, AutomataDifference: 228225.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35339.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 645 SDtfs, 8108 SDslu, 4331 SDs, 0 SdLazy, 7341 SolverSat, 1234 SolverUnsat, 36 SolverUnknown, 0 SolverNotchecked, 118987.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 329 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 131017.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=593occurred in iteration=21, InterpolantAutomatonStates: 188, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 482.1ms AutomataMinimizationTime, 21 MinimizatonAttempts, 13644 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 236.7ms SsaConstructionTime, 1633.0ms SatisfiabilityAnalysisTime, 45105.1ms InterpolantComputationTime, 155 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 268 ConstructedInterpolants, 58 QuantifiedInterpolants, 6181 SizeOfPredicates, 119 NumberOfNonLiveVariables, 1805 ConjunctsInSsa, 242 ConjunctsInUnsatCore, 42 InterpolantComputations, 23 PerfectInterpolantSequences, 52/474 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown